asmlinkage void buserr_c()

in kernel/traps.c [751:803]

• 49 lines of code
• 16 McCabe index (conditional complexity)

asmlinkage void buserr_c(struct frame *fp)
{
	/* Only set esp0 if coming from user mode */
	if (user_mode(&fp->ptregs))
		current->thread.esp0 = (unsigned long) fp;

	pr_debug("*** Bus Error *** Format is %x\n", fp->ptregs.format);

#if defined(CONFIG_COLDFIRE) && defined(CONFIG_MMU)
	if (CPU_IS_COLDFIRE) {
		unsigned int fs;
		fs = (fp->ptregs.vector & 0x3) |
			((fp->ptregs.vector & 0xc00) >> 8);
		switch (fs) {
		case 0x5:
		case 0x6:
		case 0x7:
		case 0x9:
		case 0xa:
		case 0xd:
		case 0xe:
		case 0xf:
			access_errorcf(fs, fp);
			return;
		default:
			break;
		}
	}
#endif /* CONFIG_COLDFIRE && CONFIG_MMU */

	switch (fp->ptregs.format) {
#if defined (CONFIG_M68060)
	case 4:				/* 68060 access error */
	  access_error060 (fp);
	  break;
#endif
#if defined (CONFIG_M68040)
	case 0x7:			/* 68040 access error */
	  access_error040 (fp);
	  break;
#endif
#if defined (CPU_M68020_OR_M68030)
	case 0xa:
	case 0xb:
	  bus_error030 (fp);
	  break;
#endif
	default:
	  die_if_kernel("bad frame format",&fp->ptregs,0);
	  pr_debug("Unknown SIGSEGV - 4\n");
	  force_sig(SIGSEGV);
	}
}